Abrasive.



S. M.-BULLOOK & H. S. LLOYD.

ABRASIVE. I APPLICATION FILED MAY 18, 1914.

Patented Mar. 30, 1915.

D 1 @Qimue Mfiu o m PET Specification of Letters JPatent.

u M. BULLOCK, or CHICAGO, am) HARRY s. LLoYn, or OAJKNPARK, ILLmors.

ABRASIVE.

Patented Mar. 30, 1015..

Application filed May 18, 1914:. Serial No. 839,212.

To all'whom it may concern:

Be it known that we, SAMUEL M. Bun

LOCK and HARRY S. LLOYD, citizens of the United States, and residents of the city of in the county of Cook and Chicago, in the county of Cook and State of Illinois, and of the villa e of Oak Park,

tate of Illinois, respectively, have invented certain new and useful Improvements in Abrasives; and we do hereby declare that the 'following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

There are a number of Ways and means of constructing abrasive or grinding wheels,

but'many of these involve atedious or mvolved process, while on the other hand those Wheels capable of being manufactured in a simplified manner, have often proved unreliable for the purpose.

This invention relates to an exceedingly simple process for coating metal, wood,

fiber, composition or fabric with an abrasive, enabling a grinding element, such as a wheel, disk or belt refinished by an inexperienced person and in a short spaceof time.

It is an object of this invention to provide a means of associating an abrasive with any suitable article by first coating or painting the article with a thin covering "of liquid,- then spreading or rubbing in a cement, and then applying slight amount of a cement powder and finally spreading thereover a mixture of the abrasive and the powder which has been thoroughly mixed and wetted with the liquid. 1

It is furthermore an object of this invention to, provide a means of applying an abrasive substance to an article by coating a fabric with a cementitious substance, and spreading thereon a mixture of abrasive and thefabric to the article by means of the cement or any other applying an suitable means.

lit is finally an object of this invention to. i

provide an improved simplified process for abrasive 'to an article. i The invention (in a preferred form) 1S 1 illustrated in the drawings and hereinafter more fully described. I

In the drawings: Figure 1 is a front face '55 view of an abrasive wheel constructed acto be constructed or cording to our invention. Fig. 2 is a section on line 2- 2 of Fig. 1.

As shown in the drawings, a disk,-which may be either metal, wood, composition or fiber, is denoted by the reference numeral 1, and has rigidly secured on one face there of a bearing collar 2, by means ofscrews 3. Both surfaces of the disk 1, are coated with an abrasive, although in a difierent Water 170% Calcium carbonate 16.05 Magnesium carbonate 2.38- Magnesium oxid 75.87 Silica 5.00

, The abrasive mixture consists of emery, carborundum, alundum, aloxite, adamite, or any other well known abrasive substance and the magnesite, the proportions of which may vary for different purposes, for example for grinding grayiron castings two parts by volume of theabrasive are mixed with one part of the calcined magnesite powder. After thoroughly mixing theseenough of the magnesium chlorid solution is added to make'the whole like wet sand,

and the wet mixture 4, is then packed upon the previously treated surface of the article.

slightly different manner, and for this purpose a piece of fabric 5, is first treated with the magnesium chlorid solution and then a slight amount of the calcined magnesite powder is applied thereon, after which a mixture of the powder and abrasive inLthe proportion of one to two,

upon the fabric. This may be allowed to thoroughly dry, and may then be applied to the disk at any s ,bsequent time, or may be applied immediately, and 1f so, the surface of the disk is wetted with the magfie- 'On the opposite surface of the disk we have shown the abrasive applied in a or any desired 'proportion, as before described, is spread loo 15 abrasive sium chlorid solution as before, and coated with the magnesite powder, after which the coated fabric is applied, of .course withthe coated surface of the fabric faced outwardly; p A

It is obvious that the various sequenceof operations for applying the abrasive substance to an article may be varied through a wide extent without departing from the 10 principles of this invention. We therefore do not purpose limiting the patent granted 0th rwise than necessitated by the prior art.

'Ve claim as our invention: 1. An abrasive coating comprising an intermixed with a maghesite ce- 'I'rient adapted to be applied on an article 

